What are the MGFA classes?

Class I: ocular only; Class II: mild generalized weakness; Class III: moderate generalized; Class IV: severe generalized; Class V: requires intubation. Each class is subdivided A (limb/axial) or B (oropharyngeal/respiratory).

Why is MGFA classification important?

MGFA classification guides treatment decisions and predicts outcomes. Higher classes correlate with greater risk of myasthenic crisis and may indicate need for aggressive immunotherapy or thymectomy.

MGFA Myasthenia Gravis Classification

Classify myasthenia gravis severity using the Myasthenia Gravis Foundation of America (MGFA) clinical classification system from Class I (ocular) to Class V (intubation required).

Use the full interactive calculator below, or

Related Calculators

QMG Score

Medical

MRC Dyspnoea

Medical

SOFA Score

Medical Calculators

MGFA Myasthenia Gravis Classification

Related Calculators

Frequently Asked Questions

What are the MGFA classes?

Why is MGFA classification important?